MR-50 radiation detector (ray ionizing radiation) small size, light weight, easy to carry, while maintaining real-time maximum value, is a new cost-effective multi-function ray radiation detector. It is a multifunctional radiation safety monitoring instrument for personnel engaged in contact with isotopes or radiation devices, production and processing materials, safety radiation of import and export products, electronic equipment, personal dose monitoring and so on. The instrument also carries out �±, �², �³ and �§ ray measurement, display unit µSv/h, mR/h, cps, cpm, Total, users can set their own alarm threshold of dose equivalent rate according to the needs of use.